Emperor penguins have the ability to 'recycle' their own body heat. The arteries and veins lie close together so that blood is pre-cooled on the way to a penguin's feet, wings and bill and warmed on the way back to the heart. Emperors' feet are adapted to the icy conditions
It's the nucleus or the nucleolus to be exact which produces rRNA which as a structural component of ribosomes.
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If the hawks are increased in this model, the grass will increase in the food chain.
<h3>What is a Food chain?</h3>
This is defined as the sequence of transfers of matter and energy in the form of food from one organism to another.
When hawks are increased, the primary consumers will decrease which are the ones who eat the grass. This will therefore lead to an increase in the grass population.
Read more about Food chain here brainly.com/question/2179
